Improvement in feeding mechanisms for sewing-machines



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Feeding Mechanisms m Sewing-Machines. N0,l50,492 PatentedMay 5,1874.

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Patented Mew 5,1874.

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UNITE STATES PATENT OrrreE.

DAVID M. SMYTH, OF LYNN, AND GEORGE W. GL-AZIER, or SALEM, Mass,

' ASSIGNORS TO STIGKLER, ELLIOTT & wILsoN, OF NEW YORK,N. Y.

lMPROVEMENT IN FEEDING MECHANISMS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 150,492, dated May 5,1874; application filed January 6, 1874.

To all whom ct may concern Be it known that we, DAVID M. SMYTH, of Lynn,and GEORGE W. GLAZIER, of Salem, both in the State of Massachusetts,have in- "ented an Improvement in Sewing-Machine Feed-Motions, of whichthe following is a specification Our invention relates to the class ofsewingmachines in which there are two feed-movements, one the ordinarylongitudinal feed and the other a lateral feed. These feed-movementshave been locked out of action alternately by self-actin g or automaticmechanism, to perform a variety of ornamental lines of stitching, asshown in the patents of D. M. Smyth, Nos. 130,324 and 130,325. Ourimprovement relates to a device, operated by hand, for locking out ofaction the lateral feed at such a point in the zigzag or ornamentalsewing that the ordinary or straight-line sewin g will start in theproper line relative to said ornamental sewing. This device consists ofa slide and lifting plate fitted to move in the cylinder that surroundsthe pattern-cam, and provided with a pin to enter a slot in said cam.This slot is so located that the pin cannot euter it until said cam hasbrought the ornamental stitching to the desired point. This occurs onceduring the revolution of the pattern-cam, and at this time, if the slideis liberated, the pin enters the slot, and the slide is moved forward byits spring, and the liftin plate, running under the actuatingpawl, liftsit and looks out of action the lateral feed, and the ordinarystraight-line sewin commences at the proper place.

In the drawing, Figure 1 is an elevation of the feed-wheel and sectionof the ratchet-wheel moving the lateral cam; and Fig. 2 is a plan of theparts, partially in section. Fig. 3 is a longitudinal section of thepawl-lifter, patterneam, and feed-wheels. Fig. 4 is a cross-section atthe line now, and Fig. 5 is an elevation of the pattern-cam.

In Figs. 1 and 2 the feed-wheel a is upon the shaft or stud h, and isoperated by the shaft 0, cam f, lever d, clamps I), and springs c,

as is usual in sewing-machines of this class; but the wheel is free tobe moved endwise upon this shaft by a pattern-cam that is within thehollow huh I, that is secured to the end of of the shaft h, and has apin, r, entering a groove in the patternream.

This pattern-cam is turned by the ratchetwheel 3, pawl n, plate 19, andlink 0 to the cranlcpin 41:, substantially the same as in the aforesaidpatent No. 130,321, only the ratchet wheel is upon the end of thepattern-can'i, next to the feed-wheel a.

The stud 15 upon the lever d serves for holding the longitudinal feedout of action automatically by a catch-lever, t, Fig. 2, as in saidpatent.

This mechanism allows the operator to use the pattern-cam for ornamentalstitching, or to disconnect the same and use only the ordinary straightsewing-mechanism, as may be required. v

WVhen ornamental and ordinary sewing are being made in the same line ofstitching, it is necessary that the slide Z should be moved forward atsuch a time, when changing from zigzag to straight-line sewing, as willbring the two styles of stitching in their proper relative position inthe line of sewing.

WVe accomplish this by the device shown in Figs.'3. 4, and 5. Thepattern-cam m is provided with a slot in its periphery, as at 30, andupon the under side of the slide-bar l is a'pin, 31, which passesthrough a slot in the cylinder I. hen the slide is withdrawn, the pin 31is in front of the pattern-cam n, and the zigzag or ornamental sewingwill be proceeded with. This slot 30 is so positioned that the pin 31can only enter therein when the ornamental stitching has arrived at therequired point, as determined by the revolution of the pattern-cam; andif the slide is free and is moved forward by its spring at this time,the lateral feed of the cloth is stopped at such a point that theordinary straigl'it-line sewing will start in the proper line relativeto the zigzag sewing. The slide Z is moved forward by the spring 23,when the levercam 22 is turned aside, as before .ex- 1 and theratchet-wheel 3 and feed-wheel, subplained, and its end, running inbeneath the stantially as and. for the purposes set forth. pawl n, liftsthesame and stops the lateral Signedby us this 29th day of December,

feed-motion. A. D. 187 3.

- We claim as our invention- DAVID M. SMYTH. The slide 1 and liftingplate 20, sliding in GEO. W. GLAZIER. the stationary cylinder 1, andhaving a pin, Witnesses: s 31, on its under side, in combination withthe S. A. DANIELS, revolving pattern-cam n, having a notch, 30, "W. W.WRIGHT.

